Ring-cutting tool.



N0. 653,557. Patented "*Iuly l0, I900. C. H. JENKINS. RING CUTTING TOOL. (Apblication filed Mar. 2, 1900.;

(No Model.)

@NITED STATES PATENT FFICE.

CHARLES H. JENKINS, OF LEBANON, NEW HAMPSHIRE, ASSIGNOR OF ONE- l-IALF TO KENDRIOK & DAVIS, OF SAME PLACE.

RlNG'-GUTT|NG TOOL.

SPECIFICATION forming part of Letters Patent No. 653,557, dated July 10, 1900.

Application filed March 2. 1900.

To all whom it may concern:

Be it known that 1, CHARLES H. JENKINS, a citizen of the United States, residing at Lebanon, in the county of Grafton and State New Hampshire, have invented a certain new and useful Improvement in Ring-Cutting Tools, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to, an improvement in that class of cutting-toolsespecially adapted and suited for cutting or severing fingerrings which cannot be removed or which will' not come off the finger in the usual manner by either slipping or pulling them ofifor example, when the finger or hand has become injured or swollen; and the invention has for its object to provide a simple and efficient device whereby the. ring may be severed in the easiest and quickest way and whereby the danger of mutilation of the finger, as well as that of the ring, is reduced to a minimum.

The invention consists in the novel features of construction hereinafter set forth and described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings, Figure 1 is a perspective view with a ring inserted between the saw and guard. Fig. 2 is a longitudinal vertical section taken on the line 2 2 of Fig. 3, the axle being cut off and the ring removed. Fig. 3 is a transverse vertical section taken on the line 3 3 of Fig. 2 looking in the direction of the arrow, the axle being included. Fig. 4 is a detail view of crank and axle. Fig. 5 is a plan of the saw laid flat, and Fig. 6 is a transverse section of the handle.

Like letters of reference refer to like parts throughout the several views.

a denotes the handle, and b the main part of the tool, which is constructed as a rigid. frame of metal, suitably secured to said handle. The frame bis made, preferably, of one piece of metal'and is slotted longitudinally at its outer end, thus .being divided into two parts, which may be called guides c and 0', between whichthe saw'd revolves. These guides extend slightly beyond the periphery of the saw, so as to cover and protect the teeth of the saw, except underneath, where they are cut away, as shown in Figs. 1 and 2, to per- Serial No. 7,096. (No model.)

mit the saw-teeth to come in contact with the rin e and e are bosses, and f and f circular concentric openings in the same, respectively forming bearings for the shaft or axle, as hereinafter stated. This shaft or axle is made, preferably, of one piece of metal and is provided with the circular portions h and h, adapted to revolve in the bearings f and f, respectively. This shaft or axle is also provided with a square portion M, which fits into the square hole in the center of the saw (1.

i1 is a crank suitably attached to the shaft g, and It is a handle pivoted to the crank '5 and made, preferably, as shown in the drawings, Figs. 4: and 6, with a hole in the center and concave-shaped on both sides. The end of the shaft or axle g projects slightly beyond the boss e and is provided with an annular groove Z, into which the edge of the screw m, similar to the movement-screw of a watch, fits.

n is a metal plate U -shaped in cross-section, pivoted to the frame I) at 0 and terminating at its outer end in the curved guard 19, the point of which overlaps the guides c and o.

q is a spring, one end of which is suitably attached to the frame I) and the other end pressing upon the inside of the plate n, as shown in Fig. 2.

The mode of operation of the above device, in so far as ithas not been already disclosed, is as follows: The plate n is pressed upwardly toward the frame I). This lowers the guard 19, which is then inserted between the ring and the finger. Pressure upon the plate n is now released, and the force of the spring q causes the ring to be fed to and brought into direct and immediate contact with the saw (1 and to be gripped and firmly held between the saw and the guard 19, the guides c and 0' being cut away on the under side, as above stated, thus permitting a proper engagement of the saw with the ring. By means of this construction the saw isbrought continuously and autom atically directly in contact with the ring when being cut, thereby avoiding the necessity of pressing the saw upon the rim with one hand continuously, as has been customary in devices of this character heretofore used. The handle a being held in one hand, the saw dis revolved, by means of the crank 11 and shaft g, until the ring is cut through, and when the ring is cut through the sawteeth at that particular point rest lightly or barely touch upon the guard 19 and are thus preventedfrom cuttingthefinger. Thefunction of this shaft or axle g is merely to cause the saw to revolve, the saw being guided by the guides c and c, the sides of the saw being contiguous with the inner surface of said guides. By means of this construction during the revolution of the saw the saw-teeth will strike or cut in the same place or groove in the ring, thereby insuring a smoothand clean cut. In the devices heretofore used in severing finger-rin gs the saw-teeth would not during the revolution of the saw register with the groove or line of cutting. This caused the saw to stick or bind in the cut and to mutilate the ring, and, furthermore, the saw was liable to wabble, and consequently liable to slip and injure the finger. By my construction as above set forth this accident could not happen, for the saw cuts through the ring in adirect line and the saw-teeth after the ring has been cut through cannot extend beyond the guard 19, as above stated.

If for any reason it is desired to remove the saw, the screw m is turned until the edge of the head thereof is disengaged from the groove. This permits the axle g to be pulled out. The saw may then be removed from between the guides c and c by pressing the plate in up against the frame 12 and then pushing the saw out by any suitable means. To reassemble the parts, the operation is reversed.

What I claim, and desire to secure by Letters Patent, is

1. In a ringcutting tool, a rigid frame slotted longitudinally at one end to form guides, combined with a saw or cutter journaled in said frame between said guides, and means for rotating said saw or cutter, substantially as described.

2. In a ring-cutting tool, a rigid frame constructed of a single piece of metal slotted longitudinally at one end to form guides, combiued with a saw or cutter journaled in said frame between said guides, and means for rotating said saw or cutter, substantiallyas described.

3. In a ring-cutting tool, a rigid frame slotted longitudinally at one end to form guides, the said guides being cut away at their under sides, combined with a saw or cutter journaled in said frame between said-guides, the said guides, with the exception of their cutaway portions, extending beyond the periphery of said saw or cutter, and means for rotating said saw or cutter, substantially as described.

4. In a ring-cutting tool, the combination with a rigid frame slotted longitudinally at one end to form guides, a saw orcutter journaled in said frame between said guides, and means to rotate said saw or cutter, of means secured to said frame forautomatically forcing the ring into contact with the said saw or cutter, substantially as described.

5. In a ring-cutting tool, the combination with a rigid frame slotted longitudinally at one end to form guides, a saw or cutter journaled in said frame between said guides, and means to rotate said saw or cutter, of a guard pivoted to said frame and means for forcing said guard toward the saw or cutter, substantially as described.

6. In a ring-cutting tool, the combination with a rigid frame slotted longitudinally at one end to form guides, a saw or cutter journaled in said frame between said guides, and means for rotating said saw or cutter, of a U-shaped plate pivoted to said frame and terminating at one end in a guard adapted to overlap said guides, and a spring interposed between the other end of said plate and the frame for forcing said guard toward thesaw or cutter, substantially as described.

7. In a ring-cutting tool, a rigid frame slotted longitudinally at one end to form guides, the said guides being cut away at their under sides, a saw or cutter journaled in said frame between said guides, the guides, with the exception of their cut-away portions, ex

tending beyond the periphery of the saw or cutter, and means for rotating said saw or cutter, combined with a U-shaped-platepivoted to said frame and terminating at one end in a guard adapted to overlap'said guides at their cut-away portions, and a spring interposed between the frame and the other end of said plate for forcing said guard toward the saw or cutter, substantially as de-- scribed.

8. In a ring-cutting tool, a rigid frameslot ted longitudinally at one end to form guides, concentric hearings in said guides, a shaft provided with circular portions h, h, adapted to engage said concentric bearings, and an angular portion 7L2 between said circular portions coinciding with the space between said guides, a saw or cutter arranged upon the angular portion of said shaft and adapted to be rotated between and in close proximity to the sides of said guides, substantially as described.

9. In a ring-cutting'tool', a rigid'frame slotted longitudinally to form guides, concentricbearings in said guides, a shaft provided with circular portions 71, h, adapted to engage said concentric bearings, and an angular portion h? between said circular ortions coincidin the inner surfaces of which are contiguous with the sides of the saw, and means for re volving said saw, and a guard.

In witness whereof I have hereunto affixed I5 my signature, the 21st day of February, A. D. 1900, in the presence of two witnesses.

CHARLES H. JENKINS.

Witnesses:

HENRY M. DAY, A. C. RICHARDSON, Jr. 

